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Just like any medicine, clarithromycin (Biaxin®) can cause side effects. However, not everyone who takes the medication will have problems. In fact, most people tolerate it quite well. If side effects do occur, in most cases, they are minor and either require no treatment or are easily treated by you or your healthcare provider.

Side Effects of Clarithromycin ReportSome side effects with clarithromycin, while occurring infrequently, are potentially serious and should be reported immediately to your healthcare provider. These include but are not limited to:

Low blood sugar (hypoglycemia) in people with diabetes Seizures Hallucinations, anxiety, or any other unusual changes in thoughts or behavior Watery or bloody diarrhea (which may occur long after you have stopped taking clarithromycin) Fainting Heart palpitations or an irregular heart rhythm (arrhythmia) Signs of an allergic reaction, such as:

An unexplained rash Hives Itching Unexplained swelling (especially of the lips, mouth, or throat) Wheezing or other breathing problems.